Apparatus for treating refractory ores



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J. LEEDE. APPARATUS POR TRBATING RBFRAGTORY. GRES.

No. 471,617. Patented Mar. 29, 1892.

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L -LBBW. ABPARATUS FOR TREATING REFRAGTORY GRES, No. 471,617. 'Patented-Manga'1892.

ATTO/ME75 NITE STATES PATENT OFFICE.

IULIUS LEI-EDE, OF MINNEAPOLIS, MINNESOTA.

APPARATUS FOR TREATING REFRACTORY ORES.

SPECIFICATION forming part of Letters Patent No. 471,617, dated March 29, 1892.

Application tiled October I9, 1.889. Renewed September 5, 1891. Serial No. 404.822. (No model.)

To all whom it may concern.:

Be it known that I, JULIUs LEEDE, of Min neapolis, county of Hennepin, and State of Minnesota, have invented certain new and useful Improvements in Apparatus for Treating Refractory Orcs; and I do hereby declare that the following is a full, clear, and exact description thereof.

In roasting for desulphurizing very tine ores 1o it is essential that the ore be stirred or agitated continuously or intermittently in order that the flame and heat may reach all parts thereof. This has generally been done by hand with rakes or bars projecting through the side of the furnace.

The object of my invention is to provide means whereby this may be done automatically and continuously, to the end that the best results may be obtained in the most economical manner. Y

The invention consists generally in the combination of rotary stirrers or mixers with the burner-j ets, whereby the jets are continually moving and being brought into intimate contact with the pulverulent material.

The invention also consists in constructions and combinations hereinafter described, and particularly pointed out in the claims.

' In the drawings forming a part of this specification, Figure l is a central vertical section of an apparatus constructed according to my invention. Fig. 2 is a section on the line of Fig. l, showing in plan a tripod or support for the furnace-chamber and other partsy below said furnace-chamber. Fig. 3 is a plan of the top of the machine. Fig. 4 is a plan of the bottom of the furnace, and Fig. 5 is a plan of the burner-arms.

A is the tripod or support,havingarms a a radiating from a boss a', formed with or secured thereto. The parts a a also have cast integral or secured to them risers a2 ai, upon which is supported a fianged base-piece B. The part B is flanged at b and has a base b and a lug b2, to which is pivoted a triangular door or trap B. The parts B and B form the bottom of a fire-chamber, the part B serving to support re-brick B2, which serve as the Walls of the tire-chamber or furnace. v

O is a flanged top for the firebchamber, having attached thereto a hopper c and the iue c. A peep-hole c2 and a water or steam pipe c3 are also connected with the top. The hopv per is normally closed by a damper or door c, operated by a handle or pull c5.

The fire-chamber is provided with a door O2, as-shown, for convenience in lighting the furnace-flame and other obvious purposes.V

D is a blast-pipe leading from any suitable means of forcing air, and E is a gas-pipe, also leading from a proper source of supply.v

F is a tube or pipe tted closely and loosely supported inthe bosses a and b. To the upper extremity of this tube is fixed the crosshead G. The cross-arms are hollow, plugged or stopped at their ends, and provided with depending nipples or burners g g. One crossarm is provided with an even number of nipples on each side of the tube and the other with an odd number, arranged so as to move in paths intermediate to each other. The nipples are perforated or-slitted on the side behind the path of movement.

H is a stuffing-box fitted around the tube F and blast-tube D. To the tube F is keyed or clamped a gear-Wheel I, which is slowly driven l by a revolving worm-shaft K to rotate the cross-head G, with its nipples, which serve as stirrers as Well as burners. The part B is tilted through the medium of lever L and connections, and the ore is discharged to hopper M and conducted thence by conveyer N.

In operation the gas is turned on and ignited and the blast and Worm-shaft started. The line ore is then introduced through the hopper, and the operation of roasting begins.

In this apparatus a liquid or steam jet is used either alone or charged or saturated with chemical agents for bringing the mass to the desired condition in a manner similar to that described in another application for a patent of even date herewith, Serial No. 327,890, filed IOO whereby a blow-pipe flame is brought into di rect contact with the ore While the same is being agitated, substantially as described.

2. ln an ore-treating apparatus, the combination of an ore-chamber, a series of rotatable nipples or burners arranged to move through the ore, air-blast and gas-supply pipes leading to the burners, and a movable gate in the bottom of the combustion-chamber, substantially as described.

3. In an ore-treating apparatus, the combination of an ore-chamber, a series of rotatable nipples or burners arranged to pass through the ore in the chamber, and air-blast and gassupply pipes leading to said burn ers, substantially as described.

4. Thecombination of a fire-chamber, a rotating pipe or tube, a cross -head arranged Within the ore fchamber, having nipples or burners and mounted on said pipe, and airixed myname, in the presence of two Witnesses, this lst day of October, A. D. 1889. JUL'IUs LEEDE. [n s] In presence oli-- JOHN P. GRIsT, V. D. STOCKBRIDGE. 

